Northwestern Mutual Tower Mat Foundation

Milwaukee, WI

Market: Office


CG Schmidt, Inc.



The 1.1 million sq ft Northwestern Mutual Tower in downtown Milwaukee is a 550 ft, 32-story skyscraper constructed by the joint venture team of Gilbane Building Company and CG Schmidt (CGS).  The building is founded on a 3 ft to 10 ft thick mat foundation, which was cast at the end of March when outdoor temperatures hovered around freezing.  SGH assisted the construction team by analyzing the mass concrete mix design, evaluating placement conditions, and developing a cooling system that allowed CGS to successfully place the mass concrete mat foundation.